Cosby smiled, but didn't comment as he left the Norristown, Pennsylvania courthouse, he and his entourage's path lit by the glow of TV camera lights.

Earlier in the day, the jury told O'Neill they could not come to a unanimous decision on any of the three counts of aggravated indecent assault levied against Cosby. He told them to keep on trying, sending the talks into the night. So far, they've logged 40 hours and 26 minutes of deliberations, county officials said.

O'Neill also denied a defense mistrial motion after the jury's revelation.

Cosby, 79, is accused of drugging and molesting former Temple University women's basketball staffer Andrea Constand during a 2004 encounter at the comedian's Elkins Park mansion. The case has destroyed Cosby's once good-guy, All-American dad reputation.

Not long after the jury spoke to the judge Thursday afternoon, Cosby's chief accuser Andrea Constand took to Twitter for a rare public statement. Although you can't make her out clearly in the short video, she's seen tossing a miniature basketball through a hoop as the words "Always Follow Through" come into focus. Perhaps a hopeful nudge that the jury will keep at it until they arrive at a verdict.

The Montgomery County District Attorney's Office confirmed to NBC10 Philadelphia that the account belongs to Constand and that the shot took place in a secured hallway outside DA Kevin Steele's office.

Outside the courthouse, a circus ensued after news of the deadlock filtered out. Tempers flared among Cosby accusers after the actor's fans celebrated the jury's trouble. Lili Barner, who accused Cosby of drugging and raping her, verbally sparred with his supporters. Later, a drumline led activists on a march along the courthouse's apron.

Once a jury is told to return to deliberations, they typically take a few more hours to try and reach a consensus, retired New Jersey Superior Court Judge Michael Donio said. This jury took much longer.

Donio said in his experience, a consensus is only reached about 20 to 25 percent of the time.

The sequestered jurors from western Pennsylvania have appeared increasingly tired and upset after deliberating late into the night the past four days. Some jurors looked defeated as the judge ordered them to continue deliberating. One, more upbeat, nodded along.

Constand, 44, says Cosby gave her pills that made her woozy, then violated her. His lawyer says Cosby and Constand were lovers sharing a consensual moment of intimacy.

The 12-member jury must come to a unanimous decision to convict or acquit. If the panel can't break its impasse, O'Neill could declare a hung jury and a mistrial. In that case, prosecutors would get four months to decide whether they want to retry the TV star or drop the charges.

Penn law professor David Rudovsky, a criminal lawyer in Philadelphia, said Thursday that the stalemate didn't surprise him, given the nature of the case. He added a hung jury would be a victory for Cosby.